MIL-DTL-46083D(MR)
APPENDIX A
TABLE A-VII. Minimum required ballistic limits for class II armor extrusions
(protection at 0° obliquity) - caliber .50 AP M2 projectile.
_______________________________________________________________________________
Thickness
Required
Thickness
Required
Thickness
Required
Inches
BL(P), fps
Inches
BL(P), fps
Inches
BL(P), fps
1.470
1865
1.660
2008
1.850
2142
1.475
1869
1.665
2012
1.855
2146
1.480
1872
1.670
2015
1.860
2149
1.485
1876
1.675
2019
1.865
2153
1.490
1880
1.680
2023
1.870
2156
1.495
1884
1.685
2026
1.875
2159
1/1.500
1888
1.690
2030
1.880
2163
1.505
1892
1.695
2033
1.885
2166
1.510
1896
1.700
2037
1.890
2170
1.515
1900
1.705
2041
1.895
2173
1.520
1903
1.710
2044
1.900
2176
1.525
1907
1.715
2048
1.905
2180
1.530
1911
1.720
2051
1.910
2183
1.535
1915
1.725
2055
1.915
2186
1.540
1919
1.730
2059
1.920
2190
1.545
1922
1.735
2062
1.925
2193
1.550
1926
1.740
2066
1.930
2197
1.555
1930
1.745
2069
1.935
2200
1.560
1934
1.750
2073
1.940
2203
1.565
1938
1.755
2076
1.945
2207
1.570
1941
1.760
2080
1.950
2210
1.575
1945
1.765
2083
1.955
2213
1.580
1949
1.770
2087
1.960
2217
1.585
1953
1.775
2090
1.965
2220
1.590
1956
1.780
2094
1.970
2223
1.595
1960
1.785
2097
1.975
2226
1.600
1964
1.790
2101
1.980
2230
1.605
1968
1.795
2104
1.985
2233
1.610
1971
1.800
2108
1.990
2236
1.615
1975
1.805
2111
1.995
2240
2/2.000
1.620
1979
1.810
2115
2243
1.625
1982
1.815
2118
2.005
2246
1.630
1986
1.820
2122
2.010
2249
1.635
1990
1.825
2125
2.015
2253
1.640
1993
1.830
2129
2.020
2256
1.645
1997
1.835
2132
2.025
2259
1.650
2001
1.840
2135
2.030
2263
1.655
2004
1.845
2139
______________________________________________________________________________
1/
Specification requirements begin with 1.501 inch ordered thickness.
Minimum required BL(P) = 1889 fps.
2/
Specification requirements end with this ordered thickness.
Note:
Tabulated values on either side of the specification requirements are
for interpolation of BL(P) requirements on undersize or oversize plates.
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